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2 Sheet s sssss 1.

E. PARKER. MACHINE FOR MILLING KNUGKLBS OP BUTT HINGBS.

' No. 105,487. Patented July 19, 1870;

I 2 s heets sheet 2.

I-LPARKER. MACHINE FOR MILLING'KNUGK-LESQP BUTT HINGES.

No. 105,487. Patenfed July 19, 1870 drical form of the knuckle.

nnn'uv PARKER; or NEW BRITAIN, OONNEOTIGUT, ASSlGNO-R fronussnnt eunwm MANUFACTURING COMPANY, or SAME PLACE.

heifers Patent No. 195,487, dated July 19, 1870.

IMPROVED MACHINE FOR MILLING- IHE KNUCKLES OP BUTT-HING-ES.

."tm Schedule referredto in; these Letters Patent and making part ofthe samr '[0 all whom it may concern Be it known that I, EMERY PARKER, of New Britain, in the county of Hartford and State of Connecticut, have invented-anew and useful Improved Machine for Milling the Knuckles of Butt-Hinges;

, and I do hereby declare that the following specification, taken in connection with the drawing making a part of the sannnis a full, clear, and BXZ'LCiTdCSCl'lDtlOll thereof.

Figure 1 is a view of the machine in perspective.

' x lli'gure 2 is a, vertical section.

The machine hereinafter described isintended to be employed in milling the knuckles of that class of bronze-metal butt-hinges which are usually of ornamental character, and of-costly finish. Heretoforc the knuckles of such hinges have, so far as I am aware, been finished by the file, which has added much to their cost, and is,'bcsides,'a method deficient in the degree of accuracy desirable.

Some of the parts constituting the machine are common to many machines for milling 'mctal'. Other parts, to be particularlydesignatcd, are adapted to the peculiar necessities of 'a machine for this special purpose. 1 i

A is a milling-tool, mounted on the shaft 13, which is setin proper benrings in the standards 0 G, and is to be revolved by power.

The face. of the milling-tool is adapted to the cylinl.he leaf or the butt.- hinge to be milled is,,irrcspcctivc of the particular apparatus contrived for holding it and adjusting it to the action of the cutterA, arranged upon -ajsliding V bed, 1), which is capable of being moved in a. right line, tangential to thelacc of the cutter, after the mode'of opcration'of most milling-machines. 'lhe features-of construction peculiar to this machine are-found in the devices for acconnnodating' the leaf of the hinge which is to be milled, and in the con'ibination of such devices with the sliding bed.

E is a stationary back rest'; and E", a movable front rcst. a

Each rest is fin'nished'wilh a pintle, e, to enter ,the hole which has already been". drilled through the knuckle of the leaf ofthehinge to be milled. The back rest E, being necessarily somewhat longer than the knuckle of a hinge, should be stiffened by a rib, b, and be further rendered rigid bya martingalebrace, l

The. front rest is capable of a backward and forward movement upon the bed D, to enable the'leaf of the hinge to be introduced, and to be removed when milled. I

This movement is effected by the screw G working sliding bed D.

It is necessary that the knuckle should be milled, so that, when the two leaves of a hinge are putv together, they will be in complete alignment. Accordingly, some. provision for: an adjustment of the front restlaterally is indispensable. I

That portion of the back rest E which is indicated by H is a stationary or dummy knuckle, with reference to wl1ieh the knuckle of each leaf of the l-iinge is to be aligned in the machine; and, in order that it may be used for the purpose, it is made in form like a. finished knuckle, and set permanently upon its sup porting piece E, so that its axis will, it the hinge knuckle to be milled be correctly aligned therewith, coincide with the a-xis of the latter.

The diameter of the dummy' knuckle should be. somewhat less than that of the knuckle to be dressed, so that the milling-tool will not touchits surface, but the ditlereucg should not be so great as to lhilto aflord a fair sight across its surface, so as to ciiect a I proper alignment with it of the hinge knuckle.

allel faces, m'eintroduccd between thclips of the bedpiece L, which supports the front rest, and the underlying block'l) attached to the sliding bed-piece D.

Check screws, Ii, are inserted in-the side of the lips of the bed piece, by, means of which any slight derangement of the proper relation of the front to the back rest can be corrected.

sup mrt-ing pintles, as explained, and held at the proper angle for the milling operation by means of a bolt-pin, k. The leaf is then turned to the opposite side, as showiriu dotted lines, fig. 2, and the remaining portion of its cylindrical barrel milled. The two outs of the milling-tool dress the knuckle up to its junction with the leaf.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. Constructing the back rest E with a dummy knuckle H, and suitable support 0, substantially as described, for the purposes specified.

.2. The adj ustable front rest E, the-adj ustable both piece L, and the stationary back rest E, 'all in combi .nation, substantially as described.

EMERY PARKER. \Vitnessesr M. J. WooDnUFF,

HENRY E. RcssnLL, 2d.

In operation, one half of the,hinge is set on the' 

